According to the contract, this project had completed including maintenance of air quality monitoring facility and Manually operated monitoring facility from Feb. 1, 2020 to Jan. 31, 2021. Executed the third party performance auditing of automatic detection facilities, and followed the quality control/quality assurance (QC/QA) programs, and the acceptance rate was 100%.The performance auditing of photochemical monitoring equipment also followed the quality control/quality assurance (QC/QA) programs during the performance. All the maintenance is performed regularly according to the contract (as follow), and the final report as submitted as scheduled. The availability rate of each instrument's data was over 90% each month. According to the YanJou air monitoring stations monitoring results, the SO2、NO2、O3、CO、PM10 concentration did not exceed the air quality standards during the implementation. The top five species of volatile organic compound concentration in each month include toluene, propane, ethane, n-butane, ethylene, m-p-xylene, acetylene, cumene and isopentane, etc. During the performance, the percentage of air quality index(AQI＜100) was 62%, and the red alert poor air quality station day was never occurred for 9 consecutive months. In November, due to the influence of the overall atmospheric environment in winter, 13 cases of PM2.5 red alert poor air quality station day occurred. The total number of days when the AQI exceeds 100 was 140 days; among them, the number of station days with PM2.5 as the indicator pollutant was 85 station days, and the number of station days with O3 as the indicator pollutant was 55 station days.

sampling of the manual operation monitoring station